Arc Through 3 Points

Selection prerequisites: Three noncollinear points; that is, three points that do not lie on the same line.

Constructs an arc through the three selected points. The arc starts at the first selected point, passes through the second, and ends at the third.

If subsequently you drag the three points collinear, the second point determines the arc’s display. If the second point falls between the first and third, the arc has zero measure but nonzero arc length and displays as a straight segment that starts at the first selected point, passes through the second, and ends at the third. If the second point is collinear to, but not between, the first and third, the arc disappears.